Pros:
* Very high quality feel; heavy, capacitive touch trigger backlight, and functionality of the dial.
* The dial has a very high quality feel. It makes a ratchet noise when touched for application-specific continuous or discrete scrolling.
* I've found the (programmable) dial very useful.
* The device switching buttons are very nice to have; I use the dongle with my PC, and Bluetooth with my phone.
* The software is the best I've seen for non-gaming mouse/keyboard. There is rich integration with the MX Master 2s mouse.
* Low travel, fast typing.
* Backlighting.
Cons:
* No height adjustments. Having the space-bar so close to the desk made my thumb ache.
* The keys had a very subtle squeaking noise, that triggered randomly. This drove me nuts. Logitech replaced the keyboard due to a firmware issue I reported. The replacement didn't squeak, I think.. though every once in long while I still think I hear something.
* I want the backlight on always. When I disconnect, then reconnect, the backlight turns and stays off. It must be manually turned back up. This drives me nuts.
Software limitations:
* Only a handful of keys are programmable; the function keys and the fn key. They are also shared. fn + number pad keys would have been nice to have programmable, for example.
* Complex macros are not possible with the software. For example, I cannot program a key to be 'ctrl + b' followed by just '/', but I could have 'ctrl + shift + tab'. Meanwhile there is lot of named functionality (like "tab switch" or "switch desktops") target at possibly less technical users.
* Per application profiles could be managed better. Programmable keys have global options, and application-specific overrides; but if you ever want to clear out all the application-specific functions for a specific key, you have to clear it for each application individually. This is a problem when you have lots of profiles (which you do be default because Office products' profiles, ect, are pre-installed), and you want to change the application-specific function for a key that it is mapped to for one of those programs. This leads to unexpected behavior if an application has a combination mapped that you never use with that application, but you later map globally, then discover the application-specific mapping by accident when that application happens to have focus. I've gone through and deleted all my pre-populated application profiles as a workaround.
* Both keyboard an mouse (if you have a matching mouse) must each be switched between profiles separately. Logitech has a feature called "flow" in their option software which is like synergy (as far as I can tell, I haven't used it) .e. https://en.wikipedia.org/wiki/Synergy_(software) , however it can only be installed on PC and Mac, but it could be made to treat your phone or tablet almost like a second like a second monitor if they supported android/iOS.
Other thoughts:
* I got tired of high travel mech keyboards slowing my typing. I waited for the Gram XS to come out (low travel mech keyboard) and was disappointed when it was larger (wider) than a standard keyboard and they keys were very poorly stabilized. I gave up on mechs and got this, and haven't looked back. It could be better, but its the best I can find. Logitech mice have been good to me over the years, and I'm very glad Logitech has made a keyboard of the same caliber.
* RGB backlighting would also be nice; I'd like to color-code home row, ect, a different colors.
* I really don't need to be wireless for use with my PC. It's always plugged in.
| Wireless Type | Bluetooth, 2.4 GHz Radio Frequency |
|---|
